Бандар-Сері-Бегаван is the capital city of Brunei, located on the island of Borneo. It is known for its modern architecture, including the impressive Sultan Omar Ali Saifuddien Mosque, which is a significant landmark. The city is situated along the Brunei River and features a mix of traditional and contemporary elements. The city serves as the political, economic, and cultural center of Brunei. It has a small population and is characterized by its clean streets and green spaces. Key attractions include the Royal Regalia Museum and the Brunei Museum, which showcase the country's rich heritage and history.